<!DOCTYPE html>
<html lang="">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>

    </style>
</head>

<body>
    <div></div>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        body {
            box-sizing: border-box;            
            border: 50px solid red;
            padding: 50px;   
            width: 500px;            
        }
        div {
            height: 200px;
            width: 500px;
            background-color: lightblue;
        }
    </style>
</body>

</html>